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What is hereditary nonpolyposis colorectal cancer (HNPCC) (Lynch syndrome)? What are risk-based colorectal cancer screenings? What are NCCN criteria for the evaluation of high-risk syndromes in colorectal cancer screening? What are the NCCN criteria for average risk individuals for colorectal cancer screening? What are the ACG colorectal screening guidelines? What are the ACP colorectal screening guidelines? What are the USPSTF colorectal screening guidelines? What are the ACS colorectal screening guidelines? What are the US Multi-Society Task Force on Colorectal Cancer guidelines for intervals of subsequent colorectal cancer screening? What are the US Multi-Society Task Force on Colorectal Cancer guidelines for colorectal cancer screening tests? What are tests primarily detect cancer in colorectal cancer screening? Which tests are recommended to detect adenomatous polyps and cancer in colorectal cancer screening, and what is the recommended frequency? What are the joint ACS, US Multi-Society Task Force on Colorectal Cancer and ACR guidelines for colorectal cancer screening? Which organizations have issue guidelines on colorectal cancer screening? **Colonoscopy should be performed 3-6 mo postoperatively if preoperative colonoscopy was not done, due to an obstructing lesion otherwise, colonoscopy in 1 y if abnormal, repeat in 1 year if no advanced adenoma (ie, villous polyp, polyp >1 cm, or high-grade dysplasia), repeat in 3 y, then every 5 y. Every 3-6 mo for 3 y, then every 6 -12 mo at 4 and 5 yĮvery 3-6 mo for 3 y, then every 6 mo to 5 yĮvery 3-6 mo for 2 y, then every 6 mo to 5 yĪt y 1 after surgery, and every 3-5 y thereafterĪt 1 y, then every 5 y, dictated by the findings on the previous colonoscopyĪt y 1 after surgery, and every 3-5 y dictated by the findings on the first postoperative examination.ĮSMO = European Society for Medical Oncology ASCO = American Society of Clinical Oncology NCCN = National Comprehensive Cancer Network American Society of Colon and Rectal Surgeons = ASCRS CEA = carcinoembryonic antigen CT = computed tomography * For patients at high risk for recurrence (eg, lymphatic or venous invasion, or poorly differentiated tumors).